US2891239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Angular position telemetering system
Assignee: Phillips Petroleum Co
•
Filing: 1954-04-09
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Granted: 1959-06-16
•
Expires: 1974-04-09
Abstract
No abstract record available.
Inventors
- 👤 James R Parsons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:23
CPC Classifications
G; G05; G05D; G05D3/00; G05D3/12; G05D3/14; G05D3/1418; G01; G01N; G01N21/00; G01N21/17; G01N21/41; G01N21/4133
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1086729A
Cited
US1822075A
Cited
US2420415A
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US2483102A
Cited
US2612814A
Cited
US2624014A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-15 | 1962-12-15 | 1963-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-15 | 1966-12-15 | 1967-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-15 | 1970-12-15 | 1971-06-16 | $7700.00 | Window Closed / Lapsed |